Conformal Extensions of the Standard Model with Veltman Conditions

Understand

Using the renormalisation group framework we classify different extensions of the standard model according to their degree of naturality.

• A new relevant class of perturbative models involving elementary scalars is the one in which the theory simultaneously satisfies the Veltman conditions and is conformal at the classical level.
• We term these extensions perturbative natural conformal (PNC) theories.
• We show that PNC models are very constrained and thus highly predictive.